Select the last value for each day of the table
Hello!I have a table that contains several measures for each day. I need two queries on this table, and I'm not sure how to write them.
The table stores the rows (sample data)
*DateCol1 Value Database*
27.09.2009 12:00:00 100 DB1
27.09.2009 20:00:00 150 DB1
27.09.2009 12:00:00 1000 DB2
27.09.2009 20:00:00 1100 DB2
28.09.2009 12:00:00 200 DB1
28.09.2009 20:00:00 220 DB1
28.09.2009 12:00:00 1500 DB2
28.09.2009 20:00:00 2000 DB2
Explanation of the data in the sample table:We measure the size of the data files belonging to each database to one or more times a day. The value column indicates the size of the files of database for each database at some point (date in DateCol1 European model).
What I need:
Query 1:
The query must return to the last action for each day and the database. Like this:
*DateCol1 Value Database*
27.09.2009 150 DB1
27.09.2009 1100 DB2
28.09.2009 220 DB1
28.09.2009 2000 DB2
Query 2:The query should return the average measurement for each day and the database. Like this:
*DateCol1 Value Database*
27.09.2009 125 DB1
27.09.2009 1050 DB2
28.09.2009 210 DB1
28.09.2009 1750 DB2
Could someone please help me to write these two queries?Please let me know if you need further information.
Published by: user7066552 on September 29, 2009 10:17
Published by: user7066552 on September 29, 2009 10:17
Why two queries when it suffice ;)
SQL> select dt
2 , db
3 , val
4 , avg_val
5 from (
6 select dt
7 , val
8 , db
9 , row_number () over (partition by db, trunc (dt)
10 order by dt desc
11 ) rn
12 , avg (val) over (partition by db, trunc (dt)) avg_val
13 from test)
14 where rn = 1
15 order by dt
16 /
DT DB VAL AVG_VAL
--------- ----- ---------- ----------
27-SEP-09 DB2 1100 1050
27-SEP-09 DB1 150 125
28-SEP-09 DB2 2000 1750
28-SEP-09 DB1 220 210
Tags: Database
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TNX!
NP
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The problem is in the SELECTION within the INNER JOIN. This SELECTION selects the time max for each date, because we want this and then the entire table, we choose filelds we want, but now we have only fields with the time max.
Here is a really good explanation of INNER JOIN if anyone is interested--> JOINT INTERNAL
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STAR SARA, YUI PLACED 22352 443 6/7/2009 see the
TINA, WZWICK STAR PLACED 22330 89 12/31/2008 see the
YANA STAR, KORVIN PLACED 27351 22 10/26/2008 see the
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As in the results Group 1 has a record with the date of 2008 for the whole group getting 'No Show'. Group 2 has all the records this year, so he gets the 'Show '.
Help, please!
Published by: Kuul13 on June 25, 2009 13:31
Published by: Kuul13 on June 25, 2009 13:43
I think I'm really having a BAD BAD day... Sorry again... I don't need the domain TOT_FUND_AMT...Hello
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I don't understand the output, however. Do you want to really two rows of output for each row in the table? The tot_fund_amt is copied from somewhere else? More important still, the results do not include the new flag column. Isn't the point of all of this question? It's good to describe how the indicator is calculated, but you have to show, too.
I think you want analytical MIN function to find the first app_dt in each group, like this:
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Note that the NULL acct_grp_id is a group. PARTITION BY acct_grp_id is of course necessary, but we must also, PARTITION BY ga_cd all non-BBC lines will be included in this group. In other words, we are unwilling reported as 'No Show', all ROSY just because TINA or JANA had an early app_dt.
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Hello
I was wondering if I could get some information and opinions on the use of an array of type defined clusters to store configuration data. I am creating a program to test several EHR and wanted to have a control of type defined for each HAD with the information needed to create the DAQmx tasks for all signals for it must HAVE. I am eager to do so that the data are encoded in hard and not in a file that the user might spoil.
Controls of type def are then put into a Subvi who chooses as appropriate, one based on the enumeration of Type DUT connected to a case structure.
I have problems with the control of the defined type. I see issues when you try to save a configuration unique to each element of the array in the array of clusters. Somehow, it worked at first, but now by clicking on "Operations on the data--> default font of the current value ' on individual elements of the cluster or the entire cluster (array element) does not save data when I re - open the command def. What I am doing wrong? I'm trying to do something with the berries of the clusters that I shouldn't do?
I enclose one of the defined reference type controls. I tried to change it bare to see if that helped, but no luck.
To reproduce, change the resource string for the element 0 of the array and do the new value by default. Then close the def of type, and then reopen it. The old value is always present in this element. The VI is saved in LabVIEW 2012.
The values of a typedef are not proprigated to the instances of the control. They get if created WHEN data values have changed. They will be not updated with the changes to come. You must create a VI specifically to hardcode your values or to implement a file based initialization. The base file would be much better and more flexible. If you don't want users to change the data simply encryption. There is a wedding blowfish library that you can download.
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SQL - find the minimum value for each separate record...
Hi all
I have a table like this in SQL Server
Date of sale of product
A date
A date
A date
B date of
B date of
C date
C date
C date
I would like to write a query to find the minimum date (i.e. the date
the first sale) for each product
Thus, the expected results would be
Date of sale of product
A date min
B date of min
C date of min
How can I do this using SQL Server?
any help is greatly appreciated!
Thank you!
Product SELECTION, MIN (sale_date)
From your_table
GROUP BY productEtienne
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